Rear door lock for vehicles



r'July 1, 1941. AL/1MB REAR 110011 Loox FOR VEHICLES Filed May 16', 1940' ATTO R N EYS v mw.

Patented July 1, 1941 .UNiTED STATES PA'iia-N'iv o 'calma FFICE# REAR noon Loox Fon viimouzs John A. Lamb. Detroit, Mich. Application Miss' 1s, 1940, serial No. '335,636

1 claim; v(ci. zar-m) I This invention relates to motor vehicle door locks, and its general object is to provide locks Referring to they drawing in detail, and particu1ar1y to Figures 1 to 5 inclusive, the letter A indicates a center post or pillar of a four door vehicle, B thelrear door and C the front door,

'all of which are of the usual construction and require no change to the structurethereof when of a two door vehicle of the coach type, as for.

example the locks prevent the possibility of thelv occupants of the rear seat from opening the rear doors while the vehicle is in motion, and they also eliminate the possibility" of forgetting to lock the rear doors when leaving the vehicle.

A further object is to provide a lock for a four applying this form of my lock thereto.

This formv of 'lock' includes a relatively narrow rectangular casing I of a length co-extensive with the width of the post A and is fixed to. the inner face of the post by screws 2 or the like, for disposal of the ends of the 'casing flush with the sides of the post, as clearly shown in Figure l. The casing includes top and bottom walls 2 and l, an outer side wail 5, a removable inner side wall 6, and a rear end wall 1j, while the front door vehicle that can be applied to vehicles now in use, without making any changes thereto, and merely by securing the lock parts to the inner faces of the doors and the center posts or pillars, but when applied on new vehicles, it is preferred that the parts be concealed by installingv them within the center posts and doors.

Another object is to provide a lock of the char will be had to the accompanying drawing whereend of the casing is operi.

Mounted for slidable movement within the casa ing I is a front door actuating member that includes an elongated cam block 8 having a bev-l eled outer face and formed on and extending from the flat inner face thereof is a pair of Daral1e1 T-shaped stems 9 between which is slidably mounted the head III of a T-shaped stem II of a latch bolt I2 for the rear door, the latch bolt I2 being mounted in and movable through an' opening in the rear end wall 1, while the cam block is movable through the open front end of the casing, as clearly shown iny Figures 2 and 3. The head I0 is urged and normally held engaged with the heads I3 of the T-shaped stems 9, byjan expansion coil spring I4 disposed between the'head III and the cam block 8.

Formed on or otherwise secured to the inner Y' surface of the top `and bottom walls for disposal j in alignment with each other, is a pair of lugs I5 providing fixed abutment means for one of the in like characters denote like or corresponding Y with one form of my lock installed thereon, and

with the lock parts in locked position.

Figure 2 is a sectional view taken approximately on line 2-2 of Figure 1, looking in the direction of the arrows.

Figure 3 is a view similar to Figure 2, with the parts in unlocked position. v

Figure 4 is a detail perspective view of the front door actuated member for operating the rear door bolt.

' Figure 5 is a similar view of the rear door bolt.

Figure 6 is a horizontal sectional view similar to Figure 1, but illustrates the modified or concealed form of my lock. Y

ends of a pair of expansion coil springs I6 that have their opposite ends engaged with the inner face of the cam block, and the ends of the springs I4 and I6 are mounted on studs II formed on the cam block 8, the head I0 and the lugs I5, to hold the springsJ properly positioned with respect to their bearing parts, as clearly-shown in Figures 2 and 3. By the slidable connection of the front door actuated member withthe latch bolt I2 and the association of the coil springs therewith, it will be obvious that they are not only individually movable relative to each other, but are also mov,- able in unison.

Secured to the inner face ofthe front door C by screws or the like III is a right angle strike plate I8 having its inwardly directed portion 2l arranged to engage with the beveled face of the cam block 8 when closing the front door for urginsurance-i.

end 23 of the keeper 2l, in order to allow the rear door to be closed and locked when the iront door is closed, as from Figure l, it will be noted that when the iront door is closed, the latch bolt I2 extends through the casing in the path of the keeper carried by the rear door, and is held accordingly by the spring Il. However, when the iront door is open. the camblock isurged and held outwardly of the casing by the coil springsv I6 and when in that position, the latch bolt I2 is A held within the easing, as shown in' Figure 3.

The cam block is held in its latter position, for

v disposal in the path o! the iront door, which when closed, the strike plate I9 will engage the beveled face of the cam block and move the same within the casing to allow the latch bolt I2 to move to its operative position in the path oi or within the keeper 2|, it depending of course whether the rear door is open or closed, but in any event when both doors are closed, the latch bolt I2 holds the rear door securely locked, and the rear door cannot be opened until the front door is open to release the latch bolt from vits keeper.

The concealed Figure 6 is similar in many respects to the other form, and-in fact the only material diierence is the rear door F and includes a recess 21 for receivlng the latch bolt I2. The operation of the form of Figure 6 is likewise identical to that of the other form.

Due to the fact that the' post D must be mortised for receiving the casing 24 of the form ci Figure 6 and the strike plate 25 and keeper 26 are countersunk within the doors, it is preferred that it be installed on new vehicles before leaving the factory. while the other form is preferred for cars now in general use, in that it 'can be installed thereon in an easy andexpeditious manner, and merely by the use of a screw driver.

`It is thought from the foregoing description that theadvantages and novel features of the invention will be readily apparent.

It is to he understood thatchanges may be made in the construction and in the combination and arrangement `of the several parts, provided that such changes fall within the scope of theA appended claim.

What I claim is: y

A rear door lock for a vehicle includingra iront door provided with striking'means, a rear door form ofrmy lock as shown in in the structure of the strike plate and keeper.

However; the casing 2l is preferably'provided with beveled ends to'follow the shapeof the sides ofthe center post D in that the casing 24 is disposed and secured within the post which is mortised for that purpose, as shown. All ofthe parts within the casing 2l' arev identical to provided with a keeper and a center post be tween said doors, said lock comprising a casing secured to the center post..a pair of aligned lugs secured within the casing, latching means mounted in the casing and including -a bolt for disposal in the keeper for locking the rear door in closed position, a'T-shaped stem formed on the bolt, cam means slidably mounted in and through the casing and including a block having a beveled face for disposal in the path o! the striking means, a pair of parallel T-shaped stems formed on the block and having the head oi the stem oi the bolt slidable between the same for interconnecting the stems of. the block and bolt for normally holding the bolt out oi latched position, a spring those of the form' of Figures 1 to 5 inclusive. con- Y sequently description thereof is unnecessary.

The strike plate 25 for the cam block 8 is carried by the iront door E, and in this form,'is countersunk therein, as well as xed thereto by screws. as shown. Y The keeper 26 is counter-sunk within between the block and the head of the bolt stem Yfor urging `lthe bolt to latched position', and

springs between the lugs and the block for urging-.the latter in the path of the striking means to be moved thereby upon closing the front door 'to allow the bolt to move to latched position.

, JOHN A. LAMB. 

